The previously-blonde actress, who is best known for her supporting roles in The Social Network and The Five Year Engagement, debuted her new look on the cover of Entertainment Weekly, where she can be seen biting her thumb as she cowers in the arms of the ever-so seductive Mr Grey actor Jamie Dornan. He's got a grey tie suggestively wrapped around his hand and looks like a total babe (if slightly aggressive).

Kinky author EL James announced the news that 24-year-old Johnson would be starring in the film alongside the Brit actor via Twitter in September .

And ever since we've been waiting excitedly for the moment we'd get to see them together - because that means the film is really definitely happening and it will really definitely be happening very soon (production will begin in Vancouver in December, to be precise).

(Image: Entertainment Weekly)

Dakota told EW that securing the role as the world's favourite virginal student has meant she's had to start seriously working out.

"Obviously, I want to look good naked,” she said. "I totally understand now why people exercise, because it kind of f***ing feels awesome.”

“I’m a fairly worldly guy,” says Dornan. “I grew up in a very liberal place. I’m not saying we had a playroom, but I’m not shocked by [the sex in the book]. It’s essential to tell the story. I can’t believe films that don’t invoke the sexual side of it. So it works for me.”

The kinky flick is set to hit the big screen next August - until then we'll just have to re-read the book and look at their photos.